WO2020031559A1 - Method for manufacturing pneumatic tire, and molding device - Google Patents

Method for manufacturing pneumatic tire, and molding device Download PDF

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Publication number
WO2020031559A1
WO2020031559A1 PCT/JP2019/026352 JP2019026352W WO2020031559A1 WO 2020031559 A1 WO2020031559 A1 WO 2020031559A1 JP 2019026352 W JP2019026352 W JP 2019026352W WO 2020031559 A1 WO2020031559 A1 WO 2020031559A1
Authority
WO
WIPO (PCT)
Prior art keywords
reinforcing wire
drum
forming drum
width direction
forming
Prior art date
Application number
PCT/JP2019/026352
Other languages
French (fr)
Japanese (ja)
Inventor
雄太 高梨
Original Assignee
横浜ゴム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 横浜ゴム株式会社 filed Critical 横浜ゴム株式会社
Priority to EP19847825.7A priority Critical patent/EP3835045B8/en
Priority to CN201980028666.9A priority patent/CN112041155B/en
Priority to US17/266,583 priority patent/US20210291472A1/en
Publication of WO2020031559A1 publication Critical patent/WO2020031559A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/30—Applying the layers; Guiding or stretching the layers during application
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/24—Drums
    • B29D30/242—Drums for manufacturing substantially cylindrical tyre components without cores or beads, e.g. treads or belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/10—Building tyres on round cores, i.e. the shape of the core is approximately identical with the shape of the completed tyre
    • B29D30/16—Applying the layers; Guiding or stretching the layers during application
    • B29D2030/1664—Details, accessories or auxiliary operations not provided for in the other subgroups of B29D30/00
    • B29D2030/1678—Details, accessories or auxiliary operations not provided for in the other subgroups of B29D30/00 the layers being applied being substantially continuous, i.e. not being cut before the application step
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/10—Building tyres on round cores, i.e. the shape of the core is approximately identical with the shape of the completed tyre
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/10—Building tyres on round cores, i.e. the shape of the core is approximately identical with the shape of the completed tyre
    • B29D30/14—Rolling-down or pressing-down the layers in the building process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/10—Building tyres on round cores, i.e. the shape of the core is approximately identical with the shape of the completed tyre
    • B29D30/16—Applying the layers; Guiding or stretching the layers during application
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/10—Building tyres on round cores, i.e. the shape of the core is approximately identical with the shape of the completed tyre
    • B29D30/16—Applying the layers; Guiding or stretching the layers during application
    • B29D30/1635—Applying the layers; Guiding or stretching the layers during application by feeding a continuous band and moving it back and forth (zig-zag) to form an annular element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/24—Drums
    • B29D30/244—Drums for manufacturing substantially cylindrical tyre components with cores or beads, e.g. carcasses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/30—Applying the layers; Guiding or stretching the layers during application
    • B29D30/3035—Applying the layers; Guiding or stretching the layers during application by feeding a continuous band and moving it back and forth (zig-zag) to form an annular element

Definitions

  • the present invention relates to a method and a device for manufacturing a pneumatic tire, and more particularly, when a green tire is formed by laminating tire components on the outer surface of a forming drum, extends in the width direction of the forming drum.
  • the present invention relates to a method and apparatus for manufacturing a pneumatic tire, in which a reinforcing wire is continuously arranged in a circumferential direction of a forming drum and can be arranged accurately and efficiently at a predetermined position.
  • the core die is driven to rotate, and the eyelet in which one reinforcing cord is inserted is reciprocated from the vicinity of one bead ring to the vicinity of the other bead ring. That is, the reinforcing cord is fed out at a length corresponding to the length along the outer surface of the core die between the bead rings arranged on both sides in the width direction of the core die, and the payout length is considerably long. Become. Accordingly, the reinforcing cord is likely to be displaced, which is disadvantageous in that it is accurately arranged at a predetermined position. Further, since it is necessary to reciprocate the eyelet over a long distance along a complicated path, it takes a certain time to arrange the reinforcing cord at a predetermined position, and it is difficult to improve the working efficiency.
  • An object of the present invention is to form a green tire by laminating tire components on the outer surface of a forming drum, and to form a reinforcing wire rod extending in the width direction of the forming drum continuously in a circumferential direction of the forming drum. It is an object of the present invention to provide a method and apparatus for manufacturing a pneumatic tire that can be accurately and efficiently arranged at a position.
  • a method of manufacturing a pneumatic tire according to the present invention includes forming a green tire by sequentially laminating tire constituent members including a reinforcing wire on the outer surface of a forming drum, and disposing the tire on the outer surface of the forming drum.
  • a pneumatic method including: a forming step of continuously arranging the reinforcing wire rod extending in the drum width direction in the drum circumferential direction on an outer surface of the rubber member, and a vulcanizing step of vulcanizing the green tire.
  • the reinforcing wire is fed out at a predetermined length in a state where the reinforcing wire is folded from the center in the width direction of the forming drum toward one side in the width direction, and the rubber member is formed.
  • One side step of extending the reinforcing wire in the drum width direction is performed by crimping the reinforcing wire to the outer surface.
  • the other side step of extending the reinforcing wire in the drum width direction is performed by pressing out and pressing the outer surface of the rubber member on the outer surface of the rubber member, and the one side step and the other side step are performed in the drum circumferential direction. It is characterized in that the reinforcing wires extending in the drum width direction are continuously arranged in the circumferential direction of the drum by being repeatedly shifted.
  • the pneumatic tire forming apparatus of the present invention includes a forming drum on which tire constituent members including a reinforcing wire are sequentially laminated on an outer surface, a wire storage device for stocking the reinforcing wire, and feeding the reinforcing wire from the wire storing device.
  • a pneumatic tire molding apparatus comprising: an arrangement unit that presses toward the outer surface of the forming drum; and a circumferential movement mechanism that relatively moves the arrangement unit relative to the forming drum in a drum circumferential direction.
  • the arrangement unit is a one-side moving mechanism that unwinds the reinforcing wire rod at a predetermined length in a state in which the reinforcing wire is folded back from the widthwise central portion of the forming drum toward one side in the width direction.
  • the width of the forming drum from the center in the width direction to one side in the width direction is the one side.
  • Performing the process, from the widthwise central portion of the forming drum to the other side in the width direction, by performing the other side process, to reduce the length of the reinforcing wire rod when it is pressed against the outer surface of the rubber member to about half that of the related art. can do. If the payout length is short, variations in the payout length and variations in the payout direction are reduced. Therefore, it is advantageous to arrange the reinforcing wire rod extending in the width direction of the forming drum continuously at a predetermined position in the circumferential direction of the forming drum with high accuracy.
  • the reinforcing wire rod of a predetermined length in the folded state can be pressed against the outer surface of the rubber member disposed on the outer surface of the forming drum. Therefore, compared with the case where the reinforcing member is extended from the center in the width direction of the forming drum to one side or the other side in the width direction and then returned to the center and extended to be folded, The work time required per unit length can be shortened.
  • the other-side process can be started after the reinforcing wire is fed to one side in the width direction of the forming drum by a predetermined length even if the one-side process is not completed. Therefore, it is more and more advantageous to shorten the working time required per unit length of the reinforcing wire, and the working efficiency can be further improved.
  • FIG. 1 is an explanatory view exemplifying a pneumatic tire forming apparatus of the present invention in a front view with a cross section of an upper half of a forming drum.
  • FIG. 2 is an explanatory view illustrating the molding apparatus of FIG. 1 in a side view.
  • FIG. 3 is an explanatory view illustrating the arrangement unit and the forming drum of FIG. 1 in plan view.
  • FIG. 4 is an explanatory diagram illustrating the arrangement unit and the forming drum of FIG. 1 in an enlarged manner.
  • FIG. 5 is an explanatory view illustrating a state in which the reinforcing wire is fed to one side in the width direction of the forming drum by the one-side moving mechanism in FIG. FIG.
  • FIG. 6 is an explanatory view illustrating a state in which the extended reinforcing wire rod of FIG. 5 is engaged with the guide rod.
  • FIG. 7 is an explanatory view illustrating a state in which the extended reinforcing wire rod of FIG. 6 is engaged with the locking projection of the pressure roller.
  • FIG. 8 is an explanatory view illustrating a state in which tension is applied to the extended reinforcing wire rod of FIG. 7 by a pressure roller.
  • 9 is an explanatory view exemplifying a state in which the fed-out reinforcing wire rod of FIG. 8 is pressed toward the outer surface of the forming drum by a pressure roller, and the reinforcing wire rod is fed to the other side in the width direction of the forming drum by the other-side moving mechanism. .
  • FIG. 10 is an explanatory view exemplifying the reinforcing wire rod arranged in the forming step by developing the forming drum from the front.
  • FIG. 11 is an explanatory view exemplifying a reinforcing wire arranged in the forming step in a side view of the forming drum.
  • FIG. 12 is an explanatory view exemplifying a part of the green tire formed on the outer surface of the forming drum in a cross-sectional view.
  • FIG. 13 is an explanatory view exemplifying a part of the green tire vulcanized by the vulcanizing apparatus in a cross-sectional view.
  • FIG. 14 is an explanatory view illustrating a part of the manufactured pneumatic tire in a cross-sectional view.
  • FIG. 15 is an explanatory view illustrating another embodiment of the molding apparatus in a side view.
  • the pneumatic tire forming apparatus 1 of the present invention exemplified in FIGS. 1 to 4 includes a forming drum 2, a wire storage device 3 for stocking a reinforcing wire M3, and a reinforcing drum M3 which is fed out of the wire storing device 3 to form a forming drum.
  • 2 is provided with an arrangement unit 4 that presses toward the outer surface 2s, and a circumferential movement mechanism 10 that relatively moves the arrangement unit 4 relative to the forming drum 2 in the drum circumferential direction.
  • the operations of the forming drum 2, the arrangement unit 4, and the circumferential movement mechanism 10 are controlled by the control unit 11.
  • the green tire G is molded.
  • the molded green tire G is vulcanized in the vulcanization step, whereby the pneumatic tire T is completed.
  • the width direction, the circumferential direction, and the radial direction of the forming drum 2 correspond to the width direction, the circumferential direction, and the radial direction of the green tire G and the completed tire (pneumatic tire) T, respectively.
  • 1 and 14 indicate the center of the tire axis.
  • tire constituent members (M1 to M5) are sequentially laminated.
  • the tire constituent member includes a reinforcing wire rod M3. Depending on the tire specifications, necessary tire constituent members are used as appropriate.
  • a rigid core is used as the forming drum 2.
  • the rigid core 2 is a cylindrical body having an outer surface corresponding to the inner surface of the completed tire T.
  • the rigid core 2 is configured by assembling a plurality of metal segments 2A divided in the circumferential direction, for example.
  • the rigid core 2 is formed by alternately combining segments 2A having a relatively long circumferential length and segments 2A having a relatively short circumferential length in the circumferential direction.
  • the inner peripheral surface of each segment 2A and the central axis 2C are connected so as to be disassembled by a support arm 2B.
  • the rigid core 2 is disassembled by sequentially moving the relatively short segments 2A radially inward and removing them, and then sequentially moving the relatively long segments 2A radially inward to remove them.
  • the rigid core 2 not only the rigid core 2 but also various forming drums 2 on which tire constituent members (M1 to M5) are sequentially laminated when forming the green tire G can be used.
  • the wire rod storage device 3 can use various structures that can stock the reinforcing wire rod M3.
  • a reel having flange portions at both ends of a shaft core is used as the wire rod storage device 3, and the reinforcing wire rod M3 is wound around the wire rod storage device 3 and stocked.
  • the arrangement unit 4 includes a one-side moving mechanism 6 and a one-side pressure bonding unit 7 which are in charge of a range from the center in the width direction of the forming drum 2 to one side in the width direction (hereinafter, referred to as right side in this embodiment).
  • the other-side moving mechanism 8 and the other-side crimping portion 9 are provided to cover a range from the center in the width direction to the other side in the width direction (hereinafter, referred to as a left side in this embodiment). All or a part of the one-side moving mechanism 6, the one-side crimping part 7, the other-side moving mechanism 8, and the other-side crimping part 9 are provided movably with respect to the base 4a, for example.
  • two bases 4a are opposed to each other, and the arrangement unit 4 is fixed at a predetermined position by a frame or the like connected to each base 4a.
  • the one-side moving mechanism 6 and the other-side moving mechanism 8 have substantially the same structure, and are different only in the arrangement and the like corresponding to the range in which they are in charge.
  • the one-side crimping portion 7 and the other-side crimping portion 9 have substantially the same structure, and are different only in the arrangement and the like corresponding to the range in which they are assigned.
  • the arrangement unit 4 has a pair of left and right center guide rollers 5a, 5b arranged at the center in the width direction of the forming drum 2 and on the outer peripheral side of the outer surface 2s of the forming drum 2.
  • the reinforcing wire rod M3 fed from the wire rod storage tool 3 passes between the center guide rollers 5a and 5b.
  • a pair of left and right center plates 7a, 9a are arranged with the center guide rollers 5a, 5b interposed therebetween.
  • Each of the center plates 7a and 9a is configured to move in the radial direction of the forming drum 2 and to approach and separate from the outer surface 2s thereof.
  • the one-side moving mechanism 6 feeds out the reinforcing wire rod M3 from the center in the width direction of the forming drum 2 to the right side in a state where the reinforcing wire rod M3 is folded back at a predetermined length set in advance.
  • the one-side moving mechanism 6 of this embodiment has a pull roller 6A that moves in the width direction (left-right direction) of the forming drum 2.
  • the pull roller 6A has two roller portions 6b that allow the shaft core portions to be freely connected and disconnected.
  • the reinforcing wire M3 is turned back around the pull roller 6A by being engaged therewith.
  • the one-side crimping portion 7 presses the reinforcing wire rod M3 fed out by the one-side moving mechanism 6 at a predetermined length toward the outer surface 2s of the forming drum 2.
  • the one-side pressing portion 7 has a pressing roller 7b disposed on the right side of the forming drum 2 and a center plate 7a disposed on the right side of the right center guide roller 5a.
  • the pressure roller 7 b is configured to be able to move in the radial direction of the forming drum 2 on the right side of the forming drum 2 while rotating.
  • a locking projection 7c protruding from the outer peripheral surface is provided on the outer peripheral surface of the pressure roller 7b.
  • the locking projection 7c may be configured to move in the radial direction of the pressure roller 7b so that the amount of protrusion from the outer peripheral surface can be changed.
  • the one-side pressure bonding portion 7 of this embodiment includes a guide rod 7d that moves toward and away from the locking projection 7c of the pressure roller 7b, and a tension roller 7e that can move transversely between the pressure roller 7b and the center plate 7a.
  • the guide rod 7d is a rod-like body having a tapered distal end and a larger diameter than the locking projection 7c. When the guide rod 7d approaches the locking projection 7c, its tip engages with the locking projection 7c.
  • the other side moving mechanism 8 feeds out the reinforcing wire rod M3 with a predetermined length set in a folded state from the center in the width direction of the forming drum 2 toward the left side.
  • the other-side moving mechanism 8 of this embodiment has a pull roller 8A that moves in the width direction (left-right direction) of the forming drum 2.
  • the pull roller 8A has two roller portions 8b that allow the shaft core portions to be freely connected and disconnected.
  • the reinforcing wire rod M3 is turned around by being pulled around and engaged with the pull roller 8A.
  • the other-side crimping portion 9 presses the reinforcing wire rod M3 fed out by a predetermined length by the other-side moving mechanism 8 toward the outer surface 2a of the forming drum 2.
  • the other-side pressing portion 9 includes a pressing roller 9b disposed on the left side of the forming drum 2 and a center plate 9a disposed on the left side of the left center guide roller 5b.
  • the pressure roller 9b is configured to be movable on the left side of the forming drum 2 in the radial direction of the forming drum 2 while rotating.
  • a locking projection 9c protruding from the outer peripheral surface is provided on the outer peripheral surface of the pressure roller 9b.
  • the locking protrusion 9c may be configured to move in the radial direction of the pressure roller 9b so that the amount of protrusion from the outer peripheral surface can be changed.
  • the other side crimping portion 9 of this embodiment includes a guide rod 9d that moves toward and away from the locking protrusion 9c of the crimping roller 9b, and a tension roller 9e that can traverse between the crimping roller 9b and the center plate 9a.
  • the guide rod 9d is a rod-like body having a tapered distal end and a larger diameter than the locking projection 9c. When the guide rod 9d approaches the locking projection 9c, its tip engages with the locking projection 9c.
  • the pressure rollers 7b and 9b are attached to one base 4a, and the components of the arrangement unit 4 other than the pressure rollers 7b and 9b are attached to the other base 4a.
  • Circumferential movement mechanism 10 relatively moves arrangement unit 4 relative to forming drum 2 in the circumferential direction of forming drum 2.
  • a drive motor that rotationally drives the forming drum 2 is used as the circumferential direction moving mechanism 10. That is, the arrangement unit 4 is immovable in the circumferential direction of the forming drum 2 and is configured to move the forming drum 2 in the circumferential direction.
  • the configuration may be such that the forming drum 2 is not moved in the circumferential direction and the arrangement unit 4 is moved in the circumferential direction of the forming drum 2.
  • both the arrangement unit 4 and the forming drum 2 may be moved in the circumferential direction of the forming drum 2 so as to be relatively moved in the circumferential direction.
  • the tire constituent members (M1 to M5) are sequentially laminated on the outer surface 2s of the forming drum 2.
  • the inner liner M ⁇ b> 1 is wound around the outer surface 2 s of the forming drum 2 (the outer surface 2 s of substantially the entire range from one side to the other side) by an existing method.
  • a bead wire M2 is annularly crimped to the innermost peripheral portions on both sides of the outer surface of the wound inner liner M1.
  • a carcass cord forming a carcass layer is laminated on the outer surfaces of these members M1 and M2 as a reinforcing wire M3.
  • the arrangement unit 4 is used when stacking the reinforcing wires M3.
  • the reinforcing wire rod M3 is fed out of the wire rod storage tool 3 and passes between the center guide rollers 5a and 5b.
  • the reinforcing wire rod M3 is fed out by a certain length, and the front end thereof is pressed against the outer surface of the inner liner M1 by the left center plate 9a moved inward in the radial direction of the forming drum 2. Press and fix.
  • the reinforcing wire rod M3 With the tip of the reinforcing wire rod M3 fixed to the outer surface of the inner liner M1 by pressure bonding, the reinforcing wire rod M3 is wound around the pull roller 6A and engaged between the center plate 9a and the right center guide roller 5a. By engaging with the pull roller 6A, a folded portion is formed in the reinforcing wire M3. In this state, the pull roller 6A is moved rightward from the center of the forming drum 2 in the width direction. As a result, the reinforcing wire M3 is fed out with a predetermined length set in a folded state. At this time, the guide rod 7d and the tension roller 7e are disposed at predetermined standby positions, and the extended reinforcing wire M3 is inserted between the pressure roller 7b and the tension roller 7e.
  • the fed reinforcing wire M3 is twisted by about 90 ° to change the direction of the folded portion. That is, the reinforcing wires M3 facing each other at the folded portion are arranged in the radial direction of the forming drum 2 in FIG. 5, but are arranged in the circumferential direction of the forming drum 2 in FIG.
  • the arrangement unit 4 is relatively moved in the circumferential direction of the forming drum 2 by a predetermined rotation angle.
  • the right center plate 7a is moved inward in the radial direction of the forming drum, and the reinforcing wire rod M3 is pressed against the outer surface of the inner liner M1 to be fixed by pressure.
  • the left center plate 9a is moved outward in the radial direction of the forming drum 2 to be separated from the inner liner M1 and the reinforcing wire M3.
  • the guide rod 7d is moved radially outward of the forming drum 2 to pass between the reinforcing wires M3 facing each other at the folded portion. Thereby, the tip of the guide rod 7d is engaged with the locking projection 7c of the pressure roller 7b.
  • the tension roller 7e is moved outward in the radial direction of the forming drum 2 so that the tension roller 7e is moved transversely between the center plate 7a on the right side and the pressure bonding rotor 7b, thereby applying tension to the reinforcing wire M3.
  • the folded portion of the reinforcing wire M3 is engaged with the locking projection 7c.
  • the pressure roller 7b is rotated to wind the folded portion of the reinforcing wire rod M3 around the outer peripheral surface of the pressure roller 7b.
  • the guide rod 7d and the tension roller 7e return to a predetermined standby position.
  • the pressure roller 7 b is rotated and moved along the outer surface 2 s on the right side of the forming drum 2, and the fed reinforcing wire M3 is pressed and laminated on the outer surfaces of the inner liner M ⁇ b> 1 and the bead wire M ⁇ b> 2. I do. In this way, one cycle of the one-side process of extending the folded reinforcing wire rod M3 from the widthwise central portion of the forming drum 2 toward one side in the widthwise direction is completed.
  • a method in which the guide rod 7d and the tension roller 7e are omitted may be employed.
  • the locking projection 7c is made to protrude largely from the outer peripheral surface of the pressure roller 7b.
  • the locking projection 7c is passed between the reinforcing wires M3 facing each other at the folded portion.
  • the coupling between the roller portions 6b of the pull roller 6A is released to divide it.
  • the state of engagement of the reinforcing wire M3 with the pull roller 6A is released, and the reinforcing wire M3 is engaged with the locking projection 7c to maintain the folded state.
  • the pressure roller 7b is rotated to reduce the amount of protrusion of the locking projection 7c.
  • the reinforcing wire M3 is extended to the right side of the forming drum 2, but in the other-side process, the only difference is that the reinforcement wire M3 extends to the left side. That is, in the other side process, the reinforcing wire rod M3 is fed out with a predetermined length set in a folded state from the center in the width direction of the forming drum 2 toward the left side. Then, the extended reinforcing wire rod M3 is pressed against the outer surface of the inner liner M1 to extend in the drum width direction.
  • the other side process may be started after one cycle of the one-way process is completed.
  • the reinforcing wire rod M3 is fixed to the outer surface of the inner liner M1 by a predetermined length by the right center plate 7a. It can be started at the time of payout. That is, the other-side process can be started before one cycle of the one-side process is completed.
  • One cycle of the above-described one-side process and the other-side process is repeatedly performed while shifting the position at a predetermined rotation angle in the drum circumferential direction. That is, the arrangement unit 4 is moved relative to the forming drum 2 in the drum circumferential direction, and one cycle of the one-side process and the other-side process is repeated.
  • one side process is performed first, but the other side process may be performed first.
  • the outer peripheral surface A1 of the forming drum 2 (a range corresponding to a tire tread) in the width direction of the forming drum 2 as illustrated in FIGS.
  • one reinforcing wire M3 extending on both side surfaces A2 can be arranged continuously in the drum circumferential direction.
  • a new bead wire M2 is crimped and laminated on the outer surface of the reinforcing wire rod M3 laminated on the outer surface of the bead wire M2, thereby forming both ends in the width direction of the outer surface 2s of the forming drum 2.
  • the reinforcing wire M3 is sandwiched between the bead wires M2.
  • a rubber member M4 is laminated on the outer surface of the newly laminated bead wire M2 and reinforcing wire M3, and a rubber member M5 having a reinforcing layer is further laminated on the outer surface thereof, thereby completing the green tire G illustrated in FIG.
  • the molded green tire G is placed in a vulcanizing mold 12a mounted on the vulcanizing device 12 together with the rigid core 2 as illustrated in FIG. Heated at temperature.
  • the pneumatic tire T illustrated in FIG. 14 is completed through the vulcanization step of vulcanizing the green tire G for a predetermined time.
  • the rigid core 2 is disassembled and removed from the pneumatic tire T.
  • the green tire G when the green tire G is formed by sequentially laminating the tire constituent members M1 to M5 on the outer surface 2s of the forming drum 2, from the center in the width direction of the forming drum 2 to one side in the width direction.
  • the length of the reinforcing wire rod M3 to be fed out when crimped to the outer surface of the inner liner M1 can be increased.
  • the feeding length of the reinforcing wire M3 is short, the variation in the feeding length and the variation in the feeding direction become small, and the reinforcing wire M3 extending in the width direction of the forming drum 2 is moved around the forming drum 2. It can be arranged at a predetermined position with high accuracy by continuing in the direction.
  • the reinforcing wire rod M3 having a predetermined length in a folded state can be pressed against the outer surface of the inner liner M1 disposed on the outer surface 2s of the forming drum 2. Therefore, compared with the case where the reinforcing wire M3 is extended from the center in the width direction of the forming drum 2 to one side or the other side in the width direction and then returned to the center and extended to be folded back, The working time required per unit length of the wire M3 can be reduced. Accordingly, work efficiency is improved.
  • the other side process can be started even if the one side process is not completed. Along with this, it is more and more advantageous to reduce the working time required per unit length of the reinforcing wire rod M3, and the working efficiency is further improved.
  • the reinforcing wire rod M3 arranged according to the present invention is not limited to the carcass cord.
  • the present invention can be applied to a case where a reinforcing wire M3 forming a breaker layer is arranged.
  • the number of arrangement units 4 installed for one forming drum 2 is not limited to one, but may be plural.
  • a plurality (three or more units, not limited to two units) of arrangement units 4 are installed at intervals in the circumferential direction of the forming drum 2.
  • the respective placement units 4 are simultaneously operated to simultaneously perform the molding process in a plurality of ranges in which the positions in the circumferential direction of the drum are different.
  • the plurality of reinforcing wires M3 can be simultaneously extended in the width direction of the forming drum 2 and continuously arranged in the circumferential direction.
  • a carcass layer is formed by two reinforcing wires M3. Accordingly, the time required for forming the green tire G can be reduced.
  • Forming device Forming drum (rigid core) 2A Segment 2B Support arm 2C Center shaft 2s Outer surface 3 Wire rod storage unit 4 Arrangement unit 4a Base 5a, 5b Center guide roller 6 One side moving mechanism 6A Pull roller 6b Roller part 7 One side crimping part 7a Center plate 7b Crimping roller 7c Locking projection 7d guide rod 7e tension roller 8 other side moving mechanism 8A pull roller 8b roller section 9 other side pressing section 9a center plate 9b pressing roller 9c locking projection 9d guide rod 9e tension roller 10 circumferential moving mechanism 11 control section 12 vulcanizing device 12a Vulcanizing mold M1 Inner liner M2 Bead wire M3 Carcass cord (reinforcing wire) M4 Rubber member M5 Rubber member G having reinforcing layer Green tire T Pneumatic tire (completed tire)

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  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Tyre Moulding (AREA)

Abstract

Provided are a method for manufacturing a pneumatic tire, and a molding device, whereby, when a tire constituent member is layered on the outer surface of a molding drum and a green tire is molded, a reinforcing wire extending in the width direction of the drum can be efficiently arranged with good precision in a predetermined position continuously in the circumferential direction of the drum. An arranging unit 4 is caused to move relative to a molding drum 2 in the circumferential direction of the drum, and a one-side step and an other-side step are repeated, the one-side step for delivering a predetermined length of a reinforcing wire M3 in a folded state from the widthwise center part of the molding drum 2 toward one widthwise side thereof using the arranging unit 4, and pressure-bonding the reinforcing wire M3 to an inner liner M1 of an outer surface 2s of the molding drum 2, and the other-side step for delivering a predetermined length of the reinforcing wire M3 in a folded state from the widthwise center part of the molding drum 2 toward the other widthwise side thereof after a predetermined length of the reinforcing wire M3 is delivered toward the one widthwise side as described above, and pressure-bonding the reinforcing wire M3 to the outer surface of the inner liner M1.

Description

空気入りタイヤの製造方法および成形装置Manufacturing method and molding apparatus for pneumatic tire
　本発明は、空気入りタイヤの製造方法および成形装置に関し、さらに詳しくは、成形ドラムの外面にタイヤ構成部材を積層してグリーンタイヤを成形する際に、成形ドラムの幅方向に向かって延在する補強線材を成形ドラムの周方向に連続させて所定の位置に精度よく効率的に配置できる空気入りタイヤの製造方法および成形装置に関するものである。 The present invention relates to a method and a device for manufacturing a pneumatic tire, and more particularly, when a green tire is formed by laminating tire components on the outer surface of a forming drum, extends in the width direction of the forming drum. The present invention relates to a method and apparatus for manufacturing a pneumatic tire, in which a reinforcing wire is continuously arranged in a circumferential direction of a forming drum and can be arranged accurately and efficiently at a predetermined position.
　空気入りタイヤを製造する際に、完成タイヤのタイヤ内面形状に対応した外面形状を有する芯型（剛性コア）の外面にタイヤ構成部材を順次積層してグリーンタイヤを成形する方法がある。この成形方法において、芯型の外面に配置されたゴム部材の外面に、１本の補強用コードを芯型の幅方向に向かって延在させるとともに芯型の周方向に連続させて配置する成形工程を行うことが提案されている（特許文献１参照）。 When manufacturing a pneumatic tire, there is a method of sequentially laminating tire components on the outer surface of a core (rigid core) having an outer shape corresponding to the inner shape of the finished tire to form a green tire. In this molding method, one reinforcing cord extends on the outer surface of the rubber member disposed on the outer surface of the core mold in the width direction of the core mold and is arranged continuously in the circumferential direction of the core mold. It has been proposed to perform a process (see Patent Document 1).
　特許文献１で提案されている成形工程では、芯型を回転駆動させるとともに、１本の補強用コードが挿通されたアイレットを一方のビードリングの近傍から他方のビードリングの近傍まで往復移動させる。即ち、補強用コードは、芯型の幅方向両側に配置されたビードリングの間の芯型の外面に沿った長さに対応する長さで繰り出されることになり、繰り出し長さは相当に長くなる。これに伴い、補強用コードの位置ずれが生じ易くなり、所定の位置に精度よく配置するには不利になる。また、アイレットを複雑な経路で長い距離を往復移動させる必要があるため、補強用コードを所定位置に配置するには相応の時間が必要になり、作業効率を向上させることは難しい。 In the molding process proposed in Patent Document 1, the core die is driven to rotate, and the eyelet in which one reinforcing cord is inserted is reciprocated from the vicinity of one bead ring to the vicinity of the other bead ring. That is, the reinforcing cord is fed out at a length corresponding to the length along the outer surface of the core die between the bead rings arranged on both sides in the width direction of the core die, and the payout length is considerably long. Become. Accordingly, the reinforcing cord is likely to be displaced, which is disadvantageous in that it is accurately arranged at a predetermined position. Further, since it is necessary to reciprocate the eyelet over a long distance along a complicated path, it takes a certain time to arrange the reinforcing cord at a predetermined position, and it is difficult to improve the working efficiency.
日本国特開平６－１５５６２８号公報Japanese Patent Application Laid-Open No. Hei 6-155628
　本発明の目的は、成形ドラムの外面にタイヤ構成部材を積層してグリーンタイヤを成形する際に、成形ドラムの幅方向に向かって延在する補強線材を成形ドラムの周方向に連続させて所定の位置に精度よく効率的に配置できる空気入りタイヤの製造方法および成形装置を提供することにある。 An object of the present invention is to form a green tire by laminating tire components on the outer surface of a forming drum, and to form a reinforcing wire rod extending in the width direction of the forming drum continuously in a circumferential direction of the forming drum. It is an object of the present invention to provide a method and apparatus for manufacturing a pneumatic tire that can be accurately and efficiently arranged at a position.
　上記目的を達成するため本発明の空気入りタイヤの製造方法は、成形ドラムの外面に補強線材を含むタイヤ構成部材を順次積層してグリーンタイヤを成形し、その際に前記成形ドラムの外面に配置されたゴム部材の外面に、ドラム幅方向に向かって延在させた前記補強線材をドラム周方向に連続させて配置する成形工程と、前記グリーンタイヤを加硫する加硫工程とを有する空気入りタイヤの製造方法において、前記成形工程では、前記成形ドラムの幅方向中央部から幅方向一方側に向かって、前記補強線材を折り返した状態で予め設定された所定長さで繰り出して前記ゴム部材の外面に圧着することにより、前記補強線材をドラム幅方向に向かって延在させる一方側工程を行い、この一方側工程で前記補強線材を折り返した状態で予め設定された所定長さで前記幅方向一方側に向かって繰り出した後に、前記成形ドラムの幅方向中央部から幅方向他方側に向かって、前記補強線材を折り返した状態で予め設定された所定長さで繰り出して前記ゴム部材の外面に圧着することにより、前記補強線材をドラム幅方向に向かって延在させる他方側工程を行い、前記一方側工程および前記他方側工程を、ドラム周方向に位置をずらして繰り返し行うことにより、ドラム幅方向に向かって延在させた前記補強線材をドラム周方向に連続させて配置することを特徴とする。 In order to achieve the above object, a method of manufacturing a pneumatic tire according to the present invention includes forming a green tire by sequentially laminating tire constituent members including a reinforcing wire on the outer surface of a forming drum, and disposing the tire on the outer surface of the forming drum. A pneumatic method including: a forming step of continuously arranging the reinforcing wire rod extending in the drum width direction in the drum circumferential direction on an outer surface of the rubber member, and a vulcanizing step of vulcanizing the green tire. In the method for manufacturing a tire, in the forming step, the reinforcing wire is fed out at a predetermined length in a state where the reinforcing wire is folded from the center in the width direction of the forming drum toward one side in the width direction, and the rubber member is formed. One side step of extending the reinforcing wire in the drum width direction is performed by crimping the reinforcing wire to the outer surface. A predetermined length set in a state where the reinforcing wire is folded back from the width direction center portion of the forming drum toward the other side in the width direction after being fed out to the one side in the width direction at the predetermined length. The other side step of extending the reinforcing wire in the drum width direction is performed by pressing out and pressing the outer surface of the rubber member on the outer surface of the rubber member, and the one side step and the other side step are performed in the drum circumferential direction. It is characterized in that the reinforcing wires extending in the drum width direction are continuously arranged in the circumferential direction of the drum by being repeatedly shifted.
　本発明の空気入りタイヤの成形装置は、補強線材を含むタイヤ構成部材が外面に順次積層される成形ドラムと、前記補強線材をストックする線材保管具と、前記補強線材を前記線材保管具から繰り出して前記成形ドラムの外面に向かって押圧する配置ユニットと、前記配置ユニットを前記成形ドラムに対してドラム周方向に相対移動させる周方向移動機構とを備えた空気入りタイヤの成形装置であって、前記配置ユニットが、前記成形ドラムの幅方向中央部から幅方向一方側に向かって、前記補強線材を折り返した状態で予め設定された所定の長さで繰り出す一方側移動機構と、この繰り出した前記補強線材を前記成形ドラムの外面に向かって押圧する一方側圧着部と、前記補強線材を折り返した状態で予め設定された所定長さで前記幅方向一方側に向かって繰り出した後に、前記成形ドラムの幅方向中央部から幅方向他方側に向かって、前記補強線材を折り返した状態で予め設定された所定の長さで繰り出す他方側移動機構と、この繰り出した前記補強線材を前記成形ドラムの外面に向かって押圧する他方側圧着部とを有することを特徴とする。 The pneumatic tire forming apparatus of the present invention includes a forming drum on which tire constituent members including a reinforcing wire are sequentially laminated on an outer surface, a wire storage device for stocking the reinforcing wire, and feeding the reinforcing wire from the wire storing device. A pneumatic tire molding apparatus, comprising: an arrangement unit that presses toward the outer surface of the forming drum; and a circumferential movement mechanism that relatively moves the arrangement unit relative to the forming drum in a drum circumferential direction. The arrangement unit is a one-side moving mechanism that unwinds the reinforcing wire rod at a predetermined length in a state in which the reinforcing wire is folded back from the widthwise central portion of the forming drum toward one side in the width direction. A crimping portion for pressing a reinforcing wire toward the outer surface of the forming drum, and a width of a predetermined length set in a state in which the reinforcing wire is folded. After being unwound toward one side, the other side moving mechanism that unwinds the reinforcing wire rod at a predetermined length in a state where the reinforcing wire is folded back from the widthwise central portion of the forming drum toward the other side in the width direction, And a second-side crimping portion for pressing the extended reinforcing wire toward the outer surface of the forming drum.
　本発明によれば、成形ドラムの外面に補強線材を含むタイヤ構成部材を順次積層してグリーンタイヤを成形する際に、成形ドラムの幅方向中央部から幅方向一方側に対しては前記一方側工程を行い、成形ドラムの幅方向中央部から幅方向他方側に対しては前記他方側工程を行うことで、補強線材をゴム部材の外面に圧着する時に繰り出す長さを従来技術の半分程度にすることができる。この繰り出し長さが短ければ、繰り出し長さのばらつきや繰り出し方向のばらつきが小さくなる。そのため、成形ドラムの幅方向に向かって延在する補強線材を、成形ドラムの周方向に連続させて所定の位置に精度よく配置するには有利になる。 According to the present invention, when a green tire is formed by sequentially laminating tire constituent members including a reinforcing wire on the outer surface of a forming drum, the width of the forming drum from the center in the width direction to one side in the width direction is the one side. Performing the process, from the widthwise central portion of the forming drum to the other side in the width direction, by performing the other side process, to reduce the length of the reinforcing wire rod when it is pressed against the outer surface of the rubber member to about half that of the related art. can do. If the payout length is short, variations in the payout length and variations in the payout direction are reduced. Therefore, it is advantageous to arrange the reinforcing wire rod extending in the width direction of the forming drum continuously at a predetermined position in the circumferential direction of the forming drum with high accuracy.
　また、折り返した状態の所定長さの補強線材を、成形ドラムの外面に配置されているゴム部材の外面に圧着できる。そのため、補強部材を成形ドラムの幅方向中央部から幅方向一方側や他方側に延在させてから中央部側に戻して延在させて折り返した状態にする場合に比して、補強線材の単位長さ当たりに要する作業時間を短くすることができる。 補強 Further, the reinforcing wire rod of a predetermined length in the folded state can be pressed against the outer surface of the rubber member disposed on the outer surface of the forming drum. Therefore, compared with the case where the reinforcing member is extended from the center in the width direction of the forming drum to one side or the other side in the width direction and then returned to the center and extended to be folded, The work time required per unit length can be shortened.
　さらには、前記他方側工程は、前記一方側工程が完了していなくても、補強線材を成形ドラムの幅方向一方側に所定長さで繰り出した後に開始することができる。そのため、補強線材の単位長さ当たりに要する作業時間を短くするには益々有利になり、作業効率を一段と向上させることが可能になる。 Further, the other-side process can be started after the reinforcing wire is fed to one side in the width direction of the forming drum by a predetermined length even if the one-side process is not completed. Therefore, it is more and more advantageous to shorten the working time required per unit length of the reinforcing wire, and the working efficiency can be further improved.
図１は本発明の空気入りタイヤの成形装置を、成形ドラムの上半分を断面にして正面視で例示する説明図である。FIG. 1 is an explanatory view exemplifying a pneumatic tire forming apparatus of the present invention in a front view with a cross section of an upper half of a forming drum. 図２は図１の成形装置を側面視で例示する説明図である。FIG. 2 is an explanatory view illustrating the molding apparatus of FIG. 1 in a side view. 図３は図１の配置ユニットおよび成形ドラムを平面視で例示する説明図である。FIG. 3 is an explanatory view illustrating the arrangement unit and the forming drum of FIG. 1 in plan view. 図４は図１の配置ユニットおよび成形ドラムを拡大して例示する説明図である。FIG. 4 is an explanatory diagram illustrating the arrangement unit and the forming drum of FIG. 1 in an enlarged manner. 図５は図４の一方側移動機構により補強線材を成形ドラムの幅方向一方側に繰り出す状態を例示する説明図である。FIG. 5 is an explanatory view illustrating a state in which the reinforcing wire is fed to one side in the width direction of the forming drum by the one-side moving mechanism in FIG. 図６は図５の繰り出した補強線材をガイドロッドに係合させる状態を例示する説明図である。FIG. 6 is an explanatory view illustrating a state in which the extended reinforcing wire rod of FIG. 5 is engaged with the guide rod. 図７は図６の繰り出した補強線材を圧着ローラの係止突起に係合させる状態を例示する説明図である。FIG. 7 is an explanatory view illustrating a state in which the extended reinforcing wire rod of FIG. 6 is engaged with the locking projection of the pressure roller. 図８は図７の繰り出した補強線材に対して圧着ローラによってテンションを付加する状態を例示する説明図である。FIG. 8 is an explanatory view illustrating a state in which tension is applied to the extended reinforcing wire rod of FIG. 7 by a pressure roller. 図９は図８の繰り出した補強線材を圧着ローラによって成形ドラムの外面に向かって押圧するとともに、他方側移動機構により補強線材を成形ドラムの幅方向他方側に繰り出す状態を例示する説明図である。9 is an explanatory view exemplifying a state in which the fed-out reinforcing wire rod of FIG. 8 is pressed toward the outer surface of the forming drum by a pressure roller, and the reinforcing wire rod is fed to the other side in the width direction of the forming drum by the other-side moving mechanism. . 図１０は成形工程で配置された補強線材を、成形ドラムを正面展開して例示する説明図である。FIG. 10 is an explanatory view exemplifying the reinforcing wire rod arranged in the forming step by developing the forming drum from the front. 図１１は成形工程で配置された補強線材を、成形ドラムの側面視で例示する説明図である。FIG. 11 is an explanatory view exemplifying a reinforcing wire arranged in the forming step in a side view of the forming drum. 図１２は成形ドラムの外面に成形されたグリーンタイヤの一部を横断面視で例示する説明図である。FIG. 12 is an explanatory view exemplifying a part of the green tire formed on the outer surface of the forming drum in a cross-sectional view. 図１３は加硫装置で加硫されているグリーンタイヤの一部を横断面視で例示する説明図である。FIG. 13 is an explanatory view exemplifying a part of the green tire vulcanized by the vulcanizing apparatus in a cross-sectional view. 図１４は製造された空気入りタイヤの一部を横断面視で例示する説明図である。FIG. 14 is an explanatory view illustrating a part of the manufactured pneumatic tire in a cross-sectional view. 図１５は成形装置の別の実施形態を側面視で例示する説明図である。FIG. 15 is an explanatory view illustrating another embodiment of the molding apparatus in a side view.
　以下、本発明の空気入りタイヤの製造方法および成形装置を図に示した実施形態に基づいて説明する。 Hereinafter, a method for manufacturing a pneumatic tire and a molding apparatus according to the present invention will be described based on an embodiment shown in the drawings.
　図１～図４に例示する本発明の空気入りタイヤの成形装置１は、成形ドラム２と、補強線材Ｍ３をストックする線材保管具３と、補強線材Ｍ３を線材保管具３から繰り出して成形ドラム２の外面２ｓに向かって押圧する配置ユニット４と、配置ユニット４を成形ドラム２に対してドラム周方向に相対移動させる周方向移動機構１０とを備えている。成形ドラム２、配置ユニット４および周方向移動機構１０の動作は制御部１１により制御される。 The pneumatic tire forming apparatus 1 of the present invention exemplified in FIGS. 1 to 4 includes a forming drum 2, a wire storage device 3 for stocking a reinforcing wire M3, and a reinforcing drum M3 which is fed out of the wire storing device 3 to form a forming drum. 2 is provided with an arrangement unit 4 that presses toward the outer surface 2s, and a circumferential movement mechanism 10 that relatively moves the arrangement unit 4 relative to the forming drum 2 in the drum circumferential direction. The operations of the forming drum 2, the arrangement unit 4, and the circumferential movement mechanism 10 are controlled by the control unit 11.
　この成形装置１を用いた成形工程では、グリーンタイヤＧが成形される。成形されたグリーンタイヤＧが加硫工程において加硫されることにより、空気入りタイヤＴが完成する。尚、成形ドラム２の幅方向、周方向、半径方向はそれぞれ、グリーンタイヤＧおよび完成タイヤ（空気入りタイヤ）Ｔの幅方向、周方向、半径方向に対応する。図１、図１４の一点鎖線ＣＬはタイヤ軸の中心を示している。 グ リ ー ン In the molding process using the molding apparatus 1, the green tire G is molded. The molded green tire G is vulcanized in the vulcanization step, whereby the pneumatic tire T is completed. The width direction, the circumferential direction, and the radial direction of the forming drum 2 correspond to the width direction, the circumferential direction, and the radial direction of the green tire G and the completed tire (pneumatic tire) T, respectively. 1 and 14 indicate the center of the tire axis.
　成形ドラム２の外面２ｓには、タイヤ構成部材（Ｍ１～Ｍ５）が順次積層される。タイヤ構成部材には補強線材Ｍ３が含まれている。タイヤ仕様によっては適宜必要なタイヤ構成部材が用いられる。 タ イ ヤ On the outer surface 2s of the forming drum 2, tire constituent members (M1 to M5) are sequentially laminated. The tire constituent member includes a reinforcing wire rod M3. Depending on the tire specifications, necessary tire constituent members are used as appropriate.
　この実施形態では、成形ドラム２として剛性コアが使用されている。剛性コア２は完成タイヤＴの内面に対応する外面を有する筒状体である。剛性コア２は例えば、周方向に分割された複数の金属製のセグメント２Ａを組み付けて構成されている。この実施形態では、周方向長さが相対的に長いセグメント２Ａと相対的に短いセグメント２Ａ周方向に交互に組み合わせて剛性コア２が構成されている。それぞれのセグメント２Ａの内周面と中心軸２Ｃとが支持アーム２Ｂによって分解可能に連結されている。相対的に短いセグメント２Ａを順に半径方向内側に移動させて取り除き、次いで相対的に長いセグメント２Ａを順に半径方向内側に移動させて取り除くことで剛性コア２は分解される。本発明では剛性コア２に限らず、グリーンタイヤＧを成形する際にタイヤ構成部材（Ｍ１～Ｍ５）が順次積層される種々の成形ドラム２を用いることができる。 In this embodiment, a rigid core is used as the forming drum 2. The rigid core 2 is a cylindrical body having an outer surface corresponding to the inner surface of the completed tire T. The rigid core 2 is configured by assembling a plurality of metal segments 2A divided in the circumferential direction, for example. In this embodiment, the rigid core 2 is formed by alternately combining segments 2A having a relatively long circumferential length and segments 2A having a relatively short circumferential length in the circumferential direction. The inner peripheral surface of each segment 2A and the central axis 2C are connected so as to be disassembled by a support arm 2B. The rigid core 2 is disassembled by sequentially moving the relatively short segments 2A radially inward and removing them, and then sequentially moving the relatively long segments 2A radially inward to remove them. In the present invention, not only the rigid core 2 but also various forming drums 2 on which tire constituent members (M1 to M5) are sequentially laminated when forming the green tire G can be used.
　線材保管具３は、補強線材Ｍ３をストックできる様々な構造を用いることができる。この実施形態では線材保管具３として、軸芯の両端にフランジ部を有するリールが用いられていて、補強線材Ｍ３は線材保管具３に巻き付けられてストックされている。 The wire rod storage device 3 can use various structures that can stock the reinforcing wire rod M3. In this embodiment, a reel having flange portions at both ends of a shaft core is used as the wire rod storage device 3, and the reinforcing wire rod M3 is wound around the wire rod storage device 3 and stocked.
　配置ユニット４は、成形ドラム２の幅方向中央部から幅方向一方側（以下、この実施形態では右側という）の範囲を担当する一方側移動機構６および一方側圧着部７と、成形ドラム２の幅方向中央部から幅方向他方側（以下、この実施形態では左側という）の範囲を担当する他方側移動機構８および他方側圧着部９とを備えている。一方側移動機構６、一方側圧着部７、他方側移動機構８および他方側圧着部９の全部または一部が、例えばベース４ａに対して移動可能に設けられている。この実施形態では２枚のベース４ａが対置されていて、配置ユニット４はそれぞれのベース４ａに連結されたフレーム等によって所定位置に固定されている。 The arrangement unit 4 includes a one-side moving mechanism 6 and a one-side pressure bonding unit 7 which are in charge of a range from the center in the width direction of the forming drum 2 to one side in the width direction (hereinafter, referred to as right side in this embodiment). The other-side moving mechanism 8 and the other-side crimping portion 9 are provided to cover a range from the center in the width direction to the other side in the width direction (hereinafter, referred to as a left side in this embodiment). All or a part of the one-side moving mechanism 6, the one-side crimping part 7, the other-side moving mechanism 8, and the other-side crimping part 9 are provided movably with respect to the base 4a, for example. In this embodiment, two bases 4a are opposed to each other, and the arrangement unit 4 is fixed at a predetermined position by a frame or the like connected to each base 4a.
　一方側移動機構６と他方側移動機構８とは実質的に同じ構造であり、担当する範囲に対応して配置等が異なるだけである。一方側圧着部７と他方側圧着部９とは実質的に同じ構造であり、担当する範囲に対応して配置等が異なるだけである。 The one-side moving mechanism 6 and the other-side moving mechanism 8 have substantially the same structure, and are different only in the arrangement and the like corresponding to the range in which they are in charge. The one-side crimping portion 7 and the other-side crimping portion 9 have substantially the same structure, and are different only in the arrangement and the like corresponding to the range in which they are assigned.
　また、配置ユニット４は、成形ドラム２の幅方向中央部で、成形ドラム２の外面２ｓの外周側に配置された左右一対のセンターガイドローラ５ａ、５ｂを有している。線材保管具３から繰り出された補強線材Ｍ３は、センターガイドローラ５ａ、５ｂの間を通過する。このセンターガイドローラ５ａ、５ｂを間に挟んで左右一対のセンタープレート７ａ、９ａが配置されている。それぞれのセンタープレート７ａ、９ａは、成形ドラム２の半径方向に移動してその外面２ｓに対して近接および離反可能な構成になっている。 The arrangement unit 4 has a pair of left and right center guide rollers 5a, 5b arranged at the center in the width direction of the forming drum 2 and on the outer peripheral side of the outer surface 2s of the forming drum 2. The reinforcing wire rod M3 fed from the wire rod storage tool 3 passes between the center guide rollers 5a and 5b. A pair of left and right center plates 7a, 9a are arranged with the center guide rollers 5a, 5b interposed therebetween. Each of the center plates 7a and 9a is configured to move in the radial direction of the forming drum 2 and to approach and separate from the outer surface 2s thereof.
　一方側移動機構６は、成形ドラム２の幅方向中央部から右側に向かって、補強線材Ｍ３を折り返した状態で予め設定された所定の長さで繰り出す。この実施形態の一方側移動機構６は、成形ドラム２の幅方向（左右方向）に移動するプルローラ６Ａを有している。このプルローラ６Ａは、軸芯部どうしを連結および連結解除自在にした２つのローラ部６ｂを有している。補強線材Ｍ３はプルローラ６Ａに掛け回されて係合されることにより折り返した状態になる。 The one-side moving mechanism 6 feeds out the reinforcing wire rod M3 from the center in the width direction of the forming drum 2 to the right side in a state where the reinforcing wire rod M3 is folded back at a predetermined length set in advance. The one-side moving mechanism 6 of this embodiment has a pull roller 6A that moves in the width direction (left-right direction) of the forming drum 2. The pull roller 6A has two roller portions 6b that allow the shaft core portions to be freely connected and disconnected. The reinforcing wire M3 is turned back around the pull roller 6A by being engaged therewith.
　一方側圧着部７は、一方側移動機構６により所定長さで繰り出された補強線材Ｍ３を成形ドラム２の外面２ｓに向かって押圧する。一方側圧着部７は、成形ドラム２の右側に配置された圧着ローラ７ｂと、右側のセンターガイドローラ５ａの右側に配置されたセンタープレート７ａとを有している。圧着ローラ７ｂは回転しつつ、成形ドラム２の右側方を成形ドラム２の半径方向に移動可能な構成になっている。この圧着ローラ７ｂの外周面にはその外周面から突出した係止突起７ｃが設けられている。係止突起７ｃは、圧着ローラ７ｂの半径方向に移動する構成にして、外周面からの突出量を変更可能にすることもできる。 (1) The one-side crimping portion 7 presses the reinforcing wire rod M3 fed out by the one-side moving mechanism 6 at a predetermined length toward the outer surface 2s of the forming drum 2. The one-side pressing portion 7 has a pressing roller 7b disposed on the right side of the forming drum 2 and a center plate 7a disposed on the right side of the right center guide roller 5a. The pressure roller 7 b is configured to be able to move in the radial direction of the forming drum 2 on the right side of the forming drum 2 while rotating. On the outer peripheral surface of the pressure roller 7b, a locking projection 7c protruding from the outer peripheral surface is provided. The locking projection 7c may be configured to move in the radial direction of the pressure roller 7b so that the amount of protrusion from the outer peripheral surface can be changed.
　この実施形態の一方側圧着部７は、圧着ローラ７ｂの係止突起７ｃに対して近接および離反移動するガイドロッド７ｄと、圧着ローラ７ｂとセンタープレート７ａとの間を横断移動できるテンションローラ７ｅとを有している。ガイドロッド７ｄは、先端部が先細形状になっていて係止突起７ｃよりも太径の棒状体である。ガイドロッド７ｄは係止突起７ｃに対して近接すると、その先端が係止突起７ｃに係合する。 The one-side pressure bonding portion 7 of this embodiment includes a guide rod 7d that moves toward and away from the locking projection 7c of the pressure roller 7b, and a tension roller 7e that can move transversely between the pressure roller 7b and the center plate 7a. have. The guide rod 7d is a rod-like body having a tapered distal end and a larger diameter than the locking projection 7c. When the guide rod 7d approaches the locking projection 7c, its tip engages with the locking projection 7c.
　他方側移動機構８は、成形ドラム２の幅方向中央部から左側に向かって、補強線材Ｍ３を折り返した状態で予め設定された所定の長さで繰り出す。この実施形態の他方側移動機構８は、成形ドラム２の幅方向（左右方向）に移動するプルローラ８Ａを有している。このプルローラ８Ａは、軸芯部どうしを連結および連結解除自在にした２つのローラ部８ｂを有している。補強線材Ｍ３はプルローラ８Ａに掛け回されて係合されることにより折り返した状態になる。 The other side moving mechanism 8 feeds out the reinforcing wire rod M3 with a predetermined length set in a folded state from the center in the width direction of the forming drum 2 toward the left side. The other-side moving mechanism 8 of this embodiment has a pull roller 8A that moves in the width direction (left-right direction) of the forming drum 2. The pull roller 8A has two roller portions 8b that allow the shaft core portions to be freely connected and disconnected. The reinforcing wire rod M3 is turned around by being pulled around and engaged with the pull roller 8A.
　他方側圧着部９は、他方側移動機構８により所定長さで繰り出された補強線材Ｍ３を成形ドラム２の外面２ａに向かって押圧する。他方側圧着部９は、成形ドラム２の左側に配置された圧着ローラ９ｂと、左側のセンターガイドローラ５ｂの左側に配置されたセンタープレート９ａとを有している。圧着ローラ９ｂは回転しつつ、成形ドラム２の左側方を成形ドラム２の半径方向に移動可能な構成になっている。この圧着ローラ９ｂの外周面にはその外周面から突出した係止突起９ｃが設けられている。係止突起９ｃは、圧着ローラ９ｂの半径方向に移動する構成にして、外周面からの突出量を変更可能にすることもできる。 (4) The other-side crimping portion 9 presses the reinforcing wire rod M3 fed out by a predetermined length by the other-side moving mechanism 8 toward the outer surface 2a of the forming drum 2. The other-side pressing portion 9 includes a pressing roller 9b disposed on the left side of the forming drum 2 and a center plate 9a disposed on the left side of the left center guide roller 5b. The pressure roller 9b is configured to be movable on the left side of the forming drum 2 in the radial direction of the forming drum 2 while rotating. A locking projection 9c protruding from the outer peripheral surface is provided on the outer peripheral surface of the pressure roller 9b. The locking protrusion 9c may be configured to move in the radial direction of the pressure roller 9b so that the amount of protrusion from the outer peripheral surface can be changed.
　この実施形態の他方側圧着部９は、圧着ローラ９ｂの係止突起９ｃに対して近接および離反移動するガイドロッド９ｄと、圧着ローラ９ｂとセンタープレート９ａとの間を横断移動できるテンションローラ９ｅとを有している。ガイドロッド９ｄは、先端部が先細形状になっていて係止突起９ｃよりも太径の棒状体である。ガイドロッド９ｄは係止突起９ｃに対して近接すると、その先端が係止突起９ｃに係合する。この実施形態では、一方のベース４ａに圧着ローラ７ｂ、９ｂが取り付けられていて、他方のベース４ａに圧着ローラ７ｂ、９ｂ以外の配置ユニット４の構成部材が取り付けられている。 The other side crimping portion 9 of this embodiment includes a guide rod 9d that moves toward and away from the locking protrusion 9c of the crimping roller 9b, and a tension roller 9e that can traverse between the crimping roller 9b and the center plate 9a. have. The guide rod 9d is a rod-like body having a tapered distal end and a larger diameter than the locking projection 9c. When the guide rod 9d approaches the locking projection 9c, its tip engages with the locking projection 9c. In this embodiment, the pressure rollers 7b and 9b are attached to one base 4a, and the components of the arrangement unit 4 other than the pressure rollers 7b and 9b are attached to the other base 4a.
　周方向移動機構１０は、配置ユニット４を成形ドラム２に対して成形ドラム２の周方向に相対移動させる。この実施形態では周方向移動機構１０として、成形ドラム２を回転駆動する駆動モータが用いられている。即ち、配置ユニット４は成形ドラム２の周方向には不動状態になっていて、成形ドラム２を周方向に移動させる構成になっている。本発明では、成形ドラム２を周方向に不動状態にして、配置ユニット４を成形ドラム２の周方向に移動させる構成にすることもできる。或いは、配置ユニット４と成形ドラム２の両方を成形ドラム２の周方向に移動させる構成にして周方向に相対移動させる構成にすることもできる。 Circumferential movement mechanism 10 relatively moves arrangement unit 4 relative to forming drum 2 in the circumferential direction of forming drum 2. In this embodiment, a drive motor that rotationally drives the forming drum 2 is used as the circumferential direction moving mechanism 10. That is, the arrangement unit 4 is immovable in the circumferential direction of the forming drum 2 and is configured to move the forming drum 2 in the circumferential direction. In the present invention, the configuration may be such that the forming drum 2 is not moved in the circumferential direction and the arrangement unit 4 is moved in the circumferential direction of the forming drum 2. Alternatively, both the arrangement unit 4 and the forming drum 2 may be moved in the circumferential direction of the forming drum 2 so as to be relatively moved in the circumferential direction.
　以下、本発明の空気入りタイヤの製造方法の手順の一例を説明する。 Hereinafter, an example of a procedure of a method for manufacturing a pneumatic tire according to the present invention will be described.
　成形装置１を用いた成形工程では、成形ドラム２の外面２ｓにタイヤ構成部材（Ｍ１～Ｍ５）を順次積層する。まず、図１、図２に例示するように、成形ドラム２の外面２ｓ（一方側面から他方側面に至る概ね全範囲の外面２ｓ）に、既存の方法でインナーライナＭ１を巻き付ける。巻き付けたインナーライナＭ１の外面の両側面の最内周部にはビードワイヤＭ２を円環状に圧着する。 成形 In the forming process using the forming apparatus 1, the tire constituent members (M1 to M5) are sequentially laminated on the outer surface 2s of the forming drum 2. First, as illustrated in FIGS. 1 and 2, the inner liner M <b> 1 is wound around the outer surface 2 s of the forming drum 2 (the outer surface 2 s of substantially the entire range from one side to the other side) by an existing method. A bead wire M2 is annularly crimped to the innermost peripheral portions on both sides of the outer surface of the wound inner liner M1.
　次いで、これら部材Ｍ１、Ｍ２の外面に、カーカス層を形成するカーカスコードを補強線材Ｍ３として積層する。この補強線材Ｍ３を積層する際に配置ユニット４を用いる。図４に例示するように補強線材Ｍ３は、線材保管具３から繰り出してセンターガイドローラ５ａ、５ｂの間を通過させる。次いで、図５に例示するように補強線材Ｍ３をある程度の長さだけ繰り出してその先端部を、成形ドラム２の半径方向内側に移動させた左側のセンタープレート９ａによってインナーライナＭ１の外面に押圧して圧着固定する。 Next, a carcass cord forming a carcass layer is laminated on the outer surfaces of these members M1 and M2 as a reinforcing wire M3. The arrangement unit 4 is used when stacking the reinforcing wires M3. As illustrated in FIG. 4, the reinforcing wire rod M3 is fed out of the wire rod storage tool 3 and passes between the center guide rollers 5a and 5b. Next, as illustrated in FIG. 5, the reinforcing wire rod M3 is fed out by a certain length, and the front end thereof is pressed against the outer surface of the inner liner M1 by the left center plate 9a moved inward in the radial direction of the forming drum 2. Press and fix.
　補強線材Ｍ３の先端部をインナーライナＭ１の外面に圧着固定した状態で、センタープレート９ａと右側のセンターガイドローラ５ａとの間で補強線材Ｍ３をプルローラ６Ａに掛け回して係合させる。プルローラ６Ａに係合させることで補強線材Ｍ３に折り返し部が形成される。この状態で、プルローラ６Ａを成形ドラム２の幅方向中央部から右側に向かって移動させる。これにより、補強線材Ｍ３を折り返した状態で予め設定された所定の長さで繰り出す。この時、ガイドロッド７ｄおよびテンションローラ７ｅは所定の待機位置に配置させておき、繰り出した補強線材Ｍ３を、圧着ローラ７ｂとテンションローラ７ｅとの間に挿通させた状態にする。 (4) With the tip of the reinforcing wire rod M3 fixed to the outer surface of the inner liner M1 by pressure bonding, the reinforcing wire rod M3 is wound around the pull roller 6A and engaged between the center plate 9a and the right center guide roller 5a. By engaging with the pull roller 6A, a folded portion is formed in the reinforcing wire M3. In this state, the pull roller 6A is moved rightward from the center of the forming drum 2 in the width direction. As a result, the reinforcing wire M3 is fed out with a predetermined length set in a folded state. At this time, the guide rod 7d and the tension roller 7e are disposed at predetermined standby positions, and the extended reinforcing wire M3 is inserted between the pressure roller 7b and the tension roller 7e.
　次いで、図６に例示するように、プルローラ６Ａを成形ドラム２の周方向に回転させることにより、繰り出した補強線材Ｍ３を約９０°捩じって折り返し部の向きを変更する。即ち、折り返し部で対向する補強線材Ｍ３どうしが、図５では成形ドラム２の半径方向に並んでいるが、図６では成形ドラム２の周方向に並んでいる。補強線材Ｍ３の折り返し部の向きを変更する際に、配置ユニット４を成形ドラム２の周方向に所定の回転角度だけ相対移動させる。次いで、右側のセンタープレート７ａを成形ドラムの半径方向内側に移動させて補強線材Ｍ３をインナーライナＭ１の外面に押圧して圧着固定する。左側のセンタープレート９ａは成形ドラム２の半径方向外側に移動させてインナーライナＭ１および補強線材Ｍ３から離反させる。 Next, as illustrated in FIG. 6, by rotating the pull roller 6A in the circumferential direction of the forming drum 2, the fed reinforcing wire M3 is twisted by about 90 ° to change the direction of the folded portion. That is, the reinforcing wires M3 facing each other at the folded portion are arranged in the radial direction of the forming drum 2 in FIG. 5, but are arranged in the circumferential direction of the forming drum 2 in FIG. When changing the direction of the folded portion of the reinforcing wire M3, the arrangement unit 4 is relatively moved in the circumferential direction of the forming drum 2 by a predetermined rotation angle. Next, the right center plate 7a is moved inward in the radial direction of the forming drum, and the reinforcing wire rod M3 is pressed against the outer surface of the inner liner M1 to be fixed by pressure. The left center plate 9a is moved outward in the radial direction of the forming drum 2 to be separated from the inner liner M1 and the reinforcing wire M3.
　次いで、ガイドロッド７ｄを成形ドラム２の半径方向外側に移動させて、折り返し部で対向する補強線材Ｍ３どうしの間を通過させる。これにより、ガイドロッド７ｄの先端を圧着ローラ７ｂの係止突起７ｃに係合させる。 Next, the guide rod 7d is moved radially outward of the forming drum 2 to pass between the reinforcing wires M3 facing each other at the folded portion. Thereby, the tip of the guide rod 7d is engaged with the locking projection 7c of the pressure roller 7b.
　その後、図７に例示するようにプルローラ６Ａのローラ部６ｂどうしの結合を解除して分割させる。これにより、補強線材Ｍ３のプルローラ６Ａとの係合状態が解消されて、補強線材Ｍ３はガイドロッド７ｄに係合して折り返し状態が維持される。 (7) Then, as illustrated in FIG. 7, the coupling between the roller portions 6b of the pull roller 6A is released and the pull roller 6A is divided. As a result, the state of engagement of the reinforcing wire M3 with the pull roller 6A is released, and the reinforcing wire M3 is engaged with the guide rod 7d and the folded state is maintained.
　次いで、テンションローラ７ｅを成形ドラム２の半径方向外側に移動させることで、右側のセンタープレート７ａと圧着ロータ７ｂとの間を横断移動させて、補強線材Ｍ３にテンションを付加する。このテンションの付加によって、補強線材Ｍ３の折り返し部は係止突起７ｃに係合する。 Next, the tension roller 7e is moved outward in the radial direction of the forming drum 2 so that the tension roller 7e is moved transversely between the center plate 7a on the right side and the pressure bonding rotor 7b, thereby applying tension to the reinforcing wire M3. By the application of the tension, the folded portion of the reinforcing wire M3 is engaged with the locking projection 7c.
　次いで、図８に例示するように圧着ローラ７ｂを回転させて、補強線材Ｍ３の折り返し部を圧着ローラ７ｂの外周面に巻き付ける。この時、ガイドロッド７ｄおよびテンションローラ７ｅは所定の待機位置に戻す。 Next, as shown in FIG. 8, the pressure roller 7b is rotated to wind the folded portion of the reinforcing wire rod M3 around the outer peripheral surface of the pressure roller 7b. At this time, the guide rod 7d and the tension roller 7e return to a predetermined standby position.
　次いで、図９に例示するように圧着ローラ７ｂを回転させつつ成形ドラム２の右側の外面２ｓに沿って移動させて、繰り出した補強線材Ｍ３をインナーライナＭ１およびビードワイヤＭ２の外面に圧着して積層する。このようにして、折り返した状態の補強線材Ｍ３を成形ドラム２の幅方向中央部から幅方向一方側に向かって延在させる一方側工程の１サイクルが完了する。 Next, as illustrated in FIG. 9, the pressure roller 7 b is rotated and moved along the outer surface 2 s on the right side of the forming drum 2, and the fed reinforcing wire M3 is pressed and laminated on the outer surfaces of the inner liner M <b> 1 and the bead wire M <b> 2. I do. In this way, one cycle of the one-side process of extending the folded reinforcing wire rod M3 from the widthwise central portion of the forming drum 2 toward one side in the widthwise direction is completed.
　尚、繰り出した補強線材Ｍ３を圧着ローラ７ｂの係止突起７ｃに係合させるには、ガイドロッド７ｄやテンションローラ７ｅを省略した方法を採用することもできる。例えば、図５に例示した状態で、係止突起７ｃを圧着ローラ７ｂの外周面から大きく突出させる。この係止突起７ｃを折り返し部で対向する補強線材Ｍ３どうしの間を通過させる。次いで、プルローラ６Ａのローラ部６ｂどうしの結合を解除して分割させる。これにより、補強線材Ｍ３のプルローラ６Ａとの係合状態が解消されて、補強線材Ｍ３は係止突起７ｃに係合して折り返し状態が維持される。その後、図８に例示するように圧着ローラ７ｂを回転させ、係止突起７ｃの突出量は小さくする。 In order to engage the extended reinforcing wire rod M3 with the locking projection 7c of the pressure roller 7b, a method in which the guide rod 7d and the tension roller 7e are omitted may be employed. For example, in the state illustrated in FIG. 5, the locking projection 7c is made to protrude largely from the outer peripheral surface of the pressure roller 7b. The locking projection 7c is passed between the reinforcing wires M3 facing each other at the folded portion. Next, the coupling between the roller portions 6b of the pull roller 6A is released to divide it. As a result, the state of engagement of the reinforcing wire M3 with the pull roller 6A is released, and the reinforcing wire M3 is engaged with the locking projection 7c to maintain the folded state. Thereafter, as shown in FIG. 8, the pressure roller 7b is rotated to reduce the amount of protrusion of the locking projection 7c.
　次いで、他方側工程を開始する。一方側工程では補強線材Ｍ３を成形ドラム２の右側に延在させたが、他方側工程では左側に延在させることだけが異なり、その他は実質的に同じ動作を行う。即ち、他方側工程では、成形ドラム２の幅方向中央部から左側に向かって、補強線材Ｍ３を折り返した状態で予め設定された所定長さで繰り出す。そして、繰り出した補強線材Ｍ３をインナーライナＭ１の外面に圧着することによりドラム幅方向に向かって延在させる。 Then, start the other side process. In the one-side process, the reinforcing wire M3 is extended to the right side of the forming drum 2, but in the other-side process, the only difference is that the reinforcement wire M3 extends to the left side. That is, in the other side process, the reinforcing wire rod M3 is fed out with a predetermined length set in a folded state from the center in the width direction of the forming drum 2 toward the left side. Then, the extended reinforcing wire rod M3 is pressed against the outer surface of the inner liner M1 to extend in the drum width direction.
　他方側工程は、一方向工程の１サイクルが完了した後に開始してもよいが、一方側工程において右側のセンタープレート７ａにより、補強線材Ｍ３をインナーライナＭ１の外面に圧着固定して所定長さ繰り出した時点で開始することができる。即ち、一方側工程の１サイクルが完了する前に他方側工程を開始することができる。 The other side process may be started after one cycle of the one-way process is completed. However, in the one side process, the reinforcing wire rod M3 is fixed to the outer surface of the inner liner M1 by a predetermined length by the right center plate 7a. It can be started at the time of payout. That is, the other-side process can be started before one cycle of the one-side process is completed.
　上述した一方側工程および他方側工程の１サイクルを、ドラム周方向に所定の回転角度で位置をずらして繰り返し行う。即ち、配置ユニット４を成形ドラム２に対してドラム周方向に相対移動させて、一方側工程および他方側工程の１サイクルを繰り返し行う。尚、この実施形態では最初に一方側工程を行っているが、他方側工程を最初に行うこともできる。 {Circle around (1)} One cycle of the above-described one-side process and the other-side process is repeatedly performed while shifting the position at a predetermined rotation angle in the drum circumferential direction. That is, the arrangement unit 4 is moved relative to the forming drum 2 in the drum circumferential direction, and one cycle of the one-side process and the other-side process is repeated. In this embodiment, one side process is performed first, but the other side process may be performed first.
　成形ドラム２のドラム周方向への相対移動長さを大きくすると、補強線材Ｍ３の周方向配置ピッチが大きくなり、相対移動長さを小さくすると補強線材Ｍ３の周方向配置ピッチが小さくなる。そのため、補強線材Ｍ３の周方向配置ピッチの大きさに応じて、配置ユニット４のドラム周方向への適切な相対移動量を設定する。 (4) When the relative movement length of the forming drum 2 in the drum circumferential direction is increased, the circumferential arrangement pitch of the reinforcing wires M3 increases, and when the relative movement length is reduced, the circumferential arrangement pitch of the reinforcing wires M3 decreases. Therefore, an appropriate relative movement amount of the placement unit 4 in the drum circumferential direction is set according to the size of the circumferential arrangement pitch of the reinforcing wires M3.
　上述した一方側工程および他方側工程を繰り返し行うことで、図１０、図１１に例示するように、成形ドラム２の幅方向に向かって成形ドラム２の外周面Ａ１（タイヤトレッドに相当する範囲）および両側面Ａ２（タイヤサイドに相当する範囲）に延在させた１本の補強線材Ｍ３をドラム周方向に連続させて配置することができる。 By repeating the above-described one-side process and the other-side process, as illustrated in FIGS. 10 and 11, the outer peripheral surface A1 of the forming drum 2 (a range corresponding to a tire tread) in the width direction of the forming drum 2 as illustrated in FIGS. In addition, one reinforcing wire M3 extending on both side surfaces A2 (range corresponding to the tire side) can be arranged continuously in the drum circumferential direction.
　次いで、図１２に例示するように、ビードワイヤＭ２の外面に積層した補強線材Ｍ３の外面に、新たにビードワイヤＭ２を圧着して積層することで、成形ドラム２の外面２ｓの幅方向両端部のそれぞれで、補強線材Ｍ３をビードワイヤＭ２で挟んだ状態にする。次いで、新たに積層したビードワイヤＭ２および補強線材Ｍ３の外面にゴム部材Ｍ４を積層し、さらにその外面に補強層を有するゴム部材Ｍ５を積層することで図１２に例示するグリーンタイヤＧが完成する。 Next, as illustrated in FIG. 12, a new bead wire M2 is crimped and laminated on the outer surface of the reinforcing wire rod M3 laminated on the outer surface of the bead wire M2, thereby forming both ends in the width direction of the outer surface 2s of the forming drum 2. Thus, the reinforcing wire M3 is sandwiched between the bead wires M2. Next, a rubber member M4 is laminated on the outer surface of the newly laminated bead wire M2 and reinforcing wire M3, and a rubber member M5 having a reinforcing layer is further laminated on the outer surface thereof, thereby completing the green tire G illustrated in FIG.
　成形したグリーンタイヤＧは、図１３に例示するように剛性コア２とともに、加硫装置１２に装着された加硫用モールド１２ａの中に設置されて、所定の圧力で加圧されるとともに所定の温度で加熱される。このようにグリーンタイヤＧを所定時間、加硫する加硫工程を経ることで図１４に例示する空気入りタイヤＴが完成する。加硫工程の後で、剛性コア２を分解して空気入りタイヤＴから取り外す。 The molded green tire G is placed in a vulcanizing mold 12a mounted on the vulcanizing device 12 together with the rigid core 2 as illustrated in FIG. Heated at temperature. As described above, the pneumatic tire T illustrated in FIG. 14 is completed through the vulcanization step of vulcanizing the green tire G for a predetermined time. After the vulcanization step, the rigid core 2 is disassembled and removed from the pneumatic tire T.
　本発明によれば、成形ドラム２の外面２ｓにタイヤ構成部材Ｍ１～Ｍ５を順次積層してグリーンタイヤＧを成形する際に、成形ドラム２の幅方向中央部から幅方向一方側に対しては一方側工程を行い、成形ドラム２の幅方向中央部から幅方向他方側に対しては他方側工程を行うことで、補強線材Ｍ３をインナーライナＭ１の外面に圧着する時に繰り出す長さを従来技術の半分程度にできる。この時に補強線材Ｍ３の繰り出し長さが短ければ、繰り出し長さのばらつきや繰り出し方向のばらつきが小さくなるので、成形ドラム２の幅方向に向かって延在する補強線材Ｍ３を、成形ドラム２の周方向に連続させて所定の位置に精度よく配置できる。 According to the present invention, when the green tire G is formed by sequentially laminating the tire constituent members M1 to M5 on the outer surface 2s of the forming drum 2, from the center in the width direction of the forming drum 2 to one side in the width direction. By performing the one-side process and performing the other-side process from the center in the width direction of the forming drum 2 to the other side in the width direction, the length of the reinforcing wire rod M3 to be fed out when crimped to the outer surface of the inner liner M1 can be increased. About half of At this time, if the feeding length of the reinforcing wire M3 is short, the variation in the feeding length and the variation in the feeding direction become small, and the reinforcing wire M3 extending in the width direction of the forming drum 2 is moved around the forming drum 2. It can be arranged at a predetermined position with high accuracy by continuing in the direction.
　また、折り返した状態の所定長さの補強線材Ｍ３を、成形ドラム２の外面２ｓに配置されているインナーライナＭ１の外面に圧着できる。そのため、補強線材Ｍ３を成形ドラム２の幅方向中央部から幅方向一方側や他方側に延在させてから中央部側に戻して延在させて折り返した状態にする場合に比して、補強線材Ｍ３の単位長さ当たりに要する作業時間を短縮できる。これに伴い、作業効率が向上する。 補強 Further, the reinforcing wire rod M3 having a predetermined length in a folded state can be pressed against the outer surface of the inner liner M1 disposed on the outer surface 2s of the forming drum 2. Therefore, compared with the case where the reinforcing wire M3 is extended from the center in the width direction of the forming drum 2 to one side or the other side in the width direction and then returned to the center and extended to be folded back, The working time required per unit length of the wire M3 can be reduced. Accordingly, work efficiency is improved.
　さらには、他方側工程は、一方側工程が完了していなくても開始することができる。これに伴い、補強線材Ｍ３の単位長さ当たりに要する作業時間を短縮するには益々有利になり、作業効率が一段と向上する。 Furthermore, the other side process can be started even if the one side process is not completed. Along with this, it is more and more advantageous to reduce the working time required per unit length of the reinforcing wire rod M3, and the working efficiency is further improved.
　本発明により配置する補強線材Ｍ３は、カーカスコードに限定されない。例えば、ブレーカ層を形成する補強線材Ｍ３を配置する場合にも、本発明を適用することができる。 補強 The reinforcing wire rod M3 arranged according to the present invention is not limited to the carcass cord. For example, the present invention can be applied to a case where a reinforcing wire M3 forming a breaker layer is arranged.
　１つの成形ドラム２に対して設置する配置ユニット４の数は１台に限らず、複数台にすることもできる。例えば図１５に示すように、複数台（２台に限らず、３台以上も可能）の配置ユニット４を成形ドラム２の周方向に間隔をあけて設置する。そして、それぞれの配置ユニット４を同時に作動させて、ドラム周方向位置を異ならせた複数範囲で成形工程を同時に行う。これにより、複数本の補強線材Ｍ３を同時に成形ドラム２の幅方向に向かって延在させるとともに周方向に連続させて配置できる。この実施形態では、２本の補強線材Ｍ３によってカーカス層が形成される。これに伴い、グリーンタイヤＧの成形に要する時間を短縮することができる。 数 The number of arrangement units 4 installed for one forming drum 2 is not limited to one, but may be plural. For example, as shown in FIG. 15, a plurality (three or more units, not limited to two units) of arrangement units 4 are installed at intervals in the circumferential direction of the forming drum 2. Then, the respective placement units 4 are simultaneously operated to simultaneously perform the molding process in a plurality of ranges in which the positions in the circumferential direction of the drum are different. Thus, the plurality of reinforcing wires M3 can be simultaneously extended in the width direction of the forming drum 2 and continuously arranged in the circumferential direction. In this embodiment, a carcass layer is formed by two reinforcing wires M3. Accordingly, the time required for forming the green tire G can be reduced.
１　成形装置
２　成形ドラム（剛性コア）
２Ａ　セグメント
２Ｂ　支持アーム
２Ｃ　中心軸
２ｓ　外面
３　線材保管具
４　配置ユニット
４ａ　ベース
５ａ、５ｂ　センターガイドローラ
６　一方側移動機構
６Ａ　プルローラ
６ｂ　ローラ部
７　一方側圧着部
７ａ　センタープレート
７ｂ　圧着ローラ
７ｃ　係止突起
７ｄ　ガイドロッド
７ｅ　テンションローラ
８　他方側移動機構
８Ａ　プルローラ
８ｂ　ローラ部
９　他方側圧着部
９ａ　センタープレート
９ｂ　圧着ローラ
９ｃ　係止突起
９ｄ　ガイドロッド
９ｅ　テンションローラ
１０　周方向移動機構
１１　制御部
１２　加硫装置
１２ａ　加硫用モールド
Ｍ１　インナーライナ
Ｍ２　ビードワイヤ
Ｍ３　カーカスコード（補強線材）
Ｍ４　ゴム部材
Ｍ５　補強層を有するゴム部材
Ｇ　グリーンタイヤ
Ｔ　空気入りタイヤ（完成タイヤ） 1 Forming device 2 Forming drum (rigid core)
2A Segment 2B Support arm 2C Center shaft 2s Outer surface 3 Wire rod storage unit 4 Arrangement unit 4a Base 5a, 5b Center guide roller 6 One side moving mechanism 6A Pull roller 6b Roller part 7 One side crimping part 7a Center plate 7b Crimping roller 7c Locking projection 7d guide rod 7e tension roller 8 other side moving mechanism 8A pull roller 8b roller section 9 other side pressing section 9a center plate 9b pressing roller 9c locking projection 9d guide rod 9e tension roller 10 circumferential moving mechanism 11 control section 12 vulcanizing device 12a Vulcanizing mold M1 Inner liner M2 Bead wire M3 Carcass cord (reinforcing wire)
M4 Rubber member M5 Rubber member G having reinforcing layer Green tire T Pneumatic tire (completed tire)

Claims (8)

  1. 　成形ドラムの外面に補強線材を含むタイヤ構成部材を順次積層してグリーンタイヤを成形し、その際に前記成形ドラムの外面に配置されたゴム部材の外面に、ドラム幅方向に向かって延在させた前記補強線材をドラム周方向に連続させて配置する成形工程と、前記グリーンタイヤを加硫する加硫工程とを有する空気入りタイヤの製造方法において、
    　前記成形工程では、前記成形ドラムの幅方向中央部から幅方向一方側に向かって、前記補強線材を折り返した状態で予め設定された所定長さで繰り出して前記ゴム部材の外面に圧着することにより、前記補強線材をドラム幅方向に向かって延在させる一方側工程を行い、
    　この一方側工程で前記補強線材を折り返した状態で予め設定された所定長さで前記幅方向一方側に向かって繰り出した後に、前記成形ドラムの幅方向中央部から幅方向他方側に向かって、前記補強線材を折り返した状態で予め設定された所定長さで繰り出して前記ゴム部材の外面に圧着することにより、前記補強線材をドラム幅方向に向かって延在させる他方側工程を行い、
    　前記一方側工程および前記他方側工程を、ドラム周方向に位置をずらして繰り返し行うことにより、ドラム幅方向に向かって延在させた前記補強線材をドラム周方向に連続させて配置することを特徴とする空気入りタイヤの製造方法。     A tire component including a reinforcing wire is sequentially laminated on the outer surface of the forming drum to form a green tire, and at this time, the outer surface of a rubber member disposed on the outer surface of the forming drum is extended in the drum width direction. In a method for manufacturing a pneumatic tire, comprising a forming step of continuously arranging the reinforcing wire rods in a drum circumferential direction, and a vulcanizing step of vulcanizing the green tire.
    In the forming step, the reinforcing wire rod is fed out at a predetermined length in a folded state from the center in the width direction of the forming drum toward one side in the width direction, and is pressed against the outer surface of the rubber member. Performing one side process of extending the reinforcing wire in the drum width direction,
    In the one-side process, after the reinforcing wire is fed back toward the one side in the width direction at a predetermined length set in a state of being folded, from the center in the width direction of the forming drum toward the other side in the width direction, The other side of extending the reinforcing wire in the drum width direction is performed by rolling out the reinforcing wire in a folded state at a predetermined length set in advance and pressing the reinforcing wire on the outer surface of the rubber member,
    The one-side step and the other-side step are repeatedly performed while shifting the position in the drum circumferential direction, so that the reinforcing wire rod extending in the drum width direction is continuously arranged in the drum circumferential direction. Manufacturing method of a pneumatic tire.
  2. 　前記成形ドラムとして、完成タイヤの内面に対応する外面を有する剛性コアを使用する請求項１に記載の空気入りタイヤの製造方法。 The method according to claim 1, wherein a rigid core having an outer surface corresponding to an inner surface of the completed tire is used as the forming drum.
  3. 　前記成形工程を、ドラム周方向位置を異ならせた複数範囲で同時に行う請求項１または２に記載の空気入りタイヤの製造方法。 The method for manufacturing a pneumatic tire according to claim 1 or 2, wherein the forming step is performed simultaneously in a plurality of ranges with different positions in the drum circumferential direction.
  4. 　前記補強線材がカーカス層を形成するカーカスコードである請求項１～３のいずれかに記載の空気入りタイヤの製造方法。 4. The method for manufacturing a pneumatic tire according to claim 1, wherein the reinforcing wire is a carcass cord forming a carcass layer.
  5. 　補強線材を含むタイヤ構成部材が外面に順次積層される成形ドラムと、前記補強線材をストックする線材保管具と、前記補強線材を前記線材保管具から繰り出して前記成形ドラムの外面に向かって押圧する配置ユニットと、前記配置ユニットを前記成形ドラムに対してドラム周方向に相対移動させる周方向移動機構とを備えた空気入りタイヤの成形装置であって、
    　前記配置ユニットが、前記成形ドラムの幅方向中央部から幅方向一方側に向かって、前記補強線材を折り返した状態で予め設定された所定の長さで繰り出す一方側移動機構と、この繰り出した前記補強線材を前記成形ドラムの外面に向かって押圧する一方側圧着部と、
    　前記補強線材を折り返した状態で予め設定された所定長さで前記幅方向一方側に向かって繰り出した後に、前記成形ドラムの幅方向中央部から幅方向他方側に向かって、前記補強線材を折り返した状態で予め設定された所定の長さで繰り出す他方側移動機構と、この繰り出した前記補強線材を前記成形ドラムの外面に向かって押圧する他方側圧着部とを有することを特徴とした空気入りタイヤの成形装置。     A forming drum on which tire constituent members including a reinforcing wire are sequentially laminated on an outer surface; a wire storage device for stocking the reinforcing wire; and a reinforcing wire fed out from the wire storage device and pressed toward the outer surface of the forming drum. An arrangement unit, a pneumatic tire forming apparatus including a circumferential direction moving mechanism that relatively moves the arrangement unit relative to the forming drum in a drum circumferential direction,
    The arrangement unit is a one-side moving mechanism that unwinds the reinforcing wire rod at a predetermined length in a state in which the reinforcing wire is folded from the center in the width direction of the forming drum toward one side in the width direction. One-side crimping portion for pressing the reinforcing wire toward the outer surface of the forming drum,
    After the reinforcing wire is fed out toward the one side in the width direction at a predetermined length set in a state where the reinforcing wire is turned back, the reinforcing wire is turned back from the center in the width direction of the forming drum toward the other side in the width direction. Pneumatically having a second-side moving mechanism that feeds out the reinforcing wire rod toward the outer surface of the forming drum, and the other-side moving mechanism that feeds out the reinforcing wire rod toward the outer surface of the forming drum. Tire molding equipment.
  6. 　前記成形ドラムが、完成タイヤの内面に対応する外面を有する剛性コアである請求項５に記載の空気入りタイヤの成形装置。 The pneumatic tire forming apparatus according to claim 5, wherein the forming drum is a rigid core having an outer surface corresponding to an inner surface of the completed tire.
  7. 　前記配置ユニットが複数備わり、それぞれの前記配置ユニットが前記成形ドラムの周方向に間隔をあけて設置されていて、それぞれの前記配置ユニットを同時に作動させる構成にした請求項５または６に記載の空気入りタイヤの成形装置。 7. The air according to claim 5, wherein a plurality of the arrangement units are provided, each of the arrangement units is arranged at intervals in a circumferential direction of the forming drum, and each of the arrangement units is operated simultaneously. 8. Tire molding equipment.
  8. 　前記補強線材がカーカスコードである請求項５～７のいずれかに記載の空気入りタイヤの成形装置。 The pneumatic tire molding apparatus according to any one of claims 5 to 7, wherein the reinforcing wire is a carcass cord.
PCT/JP2019/026352 2018-08-07 2019-07-02 Method for manufacturing pneumatic tire, and molding device WO2020031559A1 (en)

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